English and Spanish Dictionary, Thesaurus and Spanish to English Translator

Definition of it's not on in English:

it's not on

phrase

informal British

It's impractical or unacceptable.

‘It doesn't matter whether the offenders are over 75 or under ten, if they make a nuisance of themselves - it's not on.’

‘I would just ask the culprits to remember that a lot of people have worked hard to obtain funding for this facility, and that it's not on for them to go around wrecking it just because they are bored.’